

   
\begin{tikzpicture}[scale=2.54]
% dpic version 2012.02.12 option -g for TikZ and PGF 1.01
\ifx\dpiclw\undefined\newdimen\dpiclw\fi
\global\def\dpicdraw{\draw[line width=\dpiclw]}
\global\def\dpicstop{;}
\dpiclw=0.8bp
\dpiclw=0.8bp
\dpicdraw (0,0)
 --(0,0.375)\dpicstop
\dpicdraw (0,0.5) circle (0.049213in)\dpicstop
\draw (0,0.4375) node{$-$};
\draw (0,0.5625) node{$+$};
\dpicdraw (0,0.625)
 --(0,1)\dpicstop
\draw (0,0.375) node[below left=-1.5bp]{$ V_{BB}$};
\dpicdraw (0,1)
 --(0.375,1)
 --(0.395833,1.041667)
 --(0.4375,0.958333)
 --(0.479167,1.041667)
 --(0.520833,0.958333)
 --(0.5625,1.041667)
 --(0.604167,0.958333)
 --(0.625,1)
 --(1,1)\dpicstop
\draw (0.5,0.958333) node[below=-1.5bp]{$ R$};
\dpicdraw (1,1)
 --(1,0.536084)\dpicstop
\global\let\dpicshdraw=\dpicdraw\global\def\dpicdraw{}
\global\def\dpicstop{--}
\dpicshdraw[fill=white!0!black]
\dpicdraw (1,0.463916)
 --(1.041667,0.536084)
 --(0.958333,0.536084)
 --(1,0.463916)\dpicstop
cycle; \global\let\dpicdraw=\dpicshdraw\global\def\dpicstop{;}
\dpicdraw (0.954282,0.463916)
 --(1.045718,0.463916)\dpicstop
\dpicdraw (1,0.463916)
 --(1,0)\dpicstop
\draw (1,0.541619) node[above left=-1.5bp]{$ +$};
\draw (0.948747,0.5) node[left=-1.5bp]{$ V_D$};
\draw (1,0.458381) node[below left=-1.5bp]{$ -$};
\filldraw[line width=0bp](0.975,0.761079)
 --(1,0.661079)
 --(1.025,0.761079) --cycle
\dpicstop
\dpicdraw (1,0.683986)
 --(1,0.761079)\dpicstop
\draw (1,0.722533) node[right=-1.5bp]{$ I_D$};
\dpicdraw (1,0)
 --(0,0)\dpicstop
\end{tikzpicture}


